Polish–Soviet War: The Battle of Warsaw begins and will last till August 25. The Red Army is defeated.

The Polish–Soviet War was fought primarily between the Second Polish Republic and the Russian Soviet Federative Socialist Republic, following World War I and the Russian Revolution.

The Battle of Warsaw, also known as the Miracle on the Vistula, was a series of battles that resulted in a decisive Polish victory and complete disintegration of the Red Army in August 1920 during the Polish–Soviet War.

August 25 is the 237th day of the year in the Gregorian calendar; 128 days remain until the end of the year.

The Workers' and Peasants' Red Army, often shortened to the Red Army, was the army and air force of the Russian Soviet Republic and, from 1922, the Soviet Union. The army was established in January 1918 by a decree of the Council of People's Commissars to oppose the military forces of the new nation's adversaries during the Russian Civil War, especially the various groups collectively known as the White Army. In February 1946, the Red Army was renamed the "Soviet Army". Following the dissolution of the Soviet Union it was split between the post-Soviet states, with its bulk becoming the Russian Ground Forces, commonly considered to be the successor of the Soviet Army.